I've 'walked' my bike past that bit a few times, I'll fill one in.
This is the location for those interested...
http://www.streetmap.co.uk/map.srf?X=324977&Y=518652&A=Y&Z=115Does look a bit silly and should be sorted.
If your in that region, the bridleway down from Hause Gate looks tempting, it's a little 'challenging' to say the least, a long section of big rock steps that may be rideable, with a better bike, more talent and bigger kahuna's than I possess